Metal small boats are in a renaissance, and among them is the legendary "Oka" series, many fishermen and hunters are still searching for information about the world's largest seafarers. Eye 4 weight boatAnd it's not just a question of curiosity, it's a critical parameter for moving on the roof of a car and launching it into the water without the help of technology.
In this article, we will take a closer look at the design features of the model, the actual weight of the hull and how it relates to the declared load capacity. You will learn why the aluminum alloys used in production have made this boat so popular for several decades. Weight specifications They directly affect stability and controllability, so they can not be ignored.
We're going to look at not only the dry numbers from your passport, but also the practical aspects of your operation, including the impact of attachments on your total weight. Often, potential owners forget to consider the weight of anchors, gear and fuel, which can lead to overload. Understanding the real situation will help you make an informed decision about your purchase.
Design features and weight of the body
The Oka-4 is made of the AMG5M aluminum-magnesium alloy, which is highly corrosive and durable. boat weight of the Oka 4The squirrel, which is about 115-120 kg in its basic configuration, is quite heavy for its class, which provides excellent resistance on the wave, but requires effort when moving over land.
The body is riveted, which eliminates the risk of depressurization of welds, but adds weight due to the flyovers and fasteners. The bottom is made flat-kiled, which allows you to confidently glid even with low-power engines, if the load does not exceed the norm. stabilizer, improving driving performance.
Importantly, weight can vary slightly depending on the year of production and the specific modification. Older specimens can be heavier due to the use of a thicker sheet of metal, which was typical for the Soviet period of production. Modern versions try to optimize the cutting, while maintaining a margin of safety.
⚠️ Warning: When buying a used boat, be sure to weigh it on a car scale. The real weight may differ from the passport by 10-15 kg due to accumulated silt, rust on the fasteners or installed additional equipment.
Why AMG5M aluminum?
The AMg5M alloy doesn't rust like steel, but it's softer. It's more likely to remember than crack when it hits a stone, and it eliminates the dent with a hammer right on the shore, which you can't do with a steel case without losing its corrosion-resistant properties.
Capacity and passenger capacity
The passenger capacity of the Oka-4 is 400 kg, which is standard for boats of this size. maximum loadIt is recommended that the vessel is still on the water and has a comfortable operating mass. For safe fishing with chop, it is recommended not to exceed 300-320 kg of total weight.
That includes the weight of all passengers, motor, fuel, anchor, gear and personal belongings, and if you plan to take three people on board, you'll have less than 80 kilograms per person, including equipment, which can be a little cramped for long sea fishing. two-man plus a minimum set of gear.
Weight distribution is also critical, because if you shift all the cargo to one side or the nose, the boat will lose stability and can flip over even with a small wave, and the centering should be strictly on the diametric axis, with the main weight in the cockpit area.
Effect of motor on total mass
The choice of the engine directly affects what the final result will be. boat weight of the Oka 4 The manufacturer recommends engines up to 8-10 hp, although many put 15 hp The weight of the engine itself can range from 20 kg (electric traction) to 35-40 kg (gasoline two-strokes).
Don't forget the weight of the fuel. A full tank of 12 liters will add about 9 kg to the weight, and a canister with a reserve of gasoline - at least another 10 kg. The trunk plate on which the engine is attached also has its weight, which is already taken into account in the design, but the additional hinged transom can weigh the stern.
When transporting on the roof of the car, the total weight of the boat with the engine and fuel can reach 160-170 kg. This requires reliable fastening and accounting for the load capacity of the roof of your car. Passenger sedans may not withstand such a load on the roof-rack, so it is better to use a trailer.
Use removable knobs to store fuel and heavy items, which will allow you to redistribute weight in the boat depending on the number of passengers and the conditions on the water.
Comparison with peers and competitors
To understand the Oki-4's market position, it's useful to compare it to other popular metal boats. Many of the competitors' models are either lighter, but less durable, or heavier, but require more powerful engines to plane. Below is a comparison table of the basic parameters.
| Model | Body weight (kg) | Load capacity (kg) | Recommended power (hp) |
|---|---|---|---|
| Oka-4 | 115 | 400 | 8-10 |
| Krym-M | 125 | 400 | 12-15 |
| Salut-4 | 105 | 350 | 5-8 |
| Ob-3 | 140 | 450 | 15-20 |
As you can see from the table, Oka-4 It is in the middle of the world in terms of weight, heavier than the Salute, which gives you a gain in comfort on the wave, but lighter than the Ob, which makes transportation easier. Competition with the Crimea is on an equal footing, but Oka often wins at the expense of a more spacious cockpit.
Choosing between these models, consider not only the dry weight, but also the geometry of the bottom. Sharp underbody competitors may require more power to enter the plane, which indirectly increases the total weight of the system “boat + engine + fuel”.
Transport and storage
Transporting a boat weighing more than 100 kg requires certain safety regulations. If you use a car trailer, there are usually no problems, but loading on the roof requires a second person or a special winch. Aluminum case sensitive to spot impacts, so soft pads should be placed under the paws of the fastener.
When storing the boat, it is better to put it on special slips or keel blocks to avoid deformation of the hull under its own weight for a long time. In winter, it is recommended to turn the boat upside down so that moisture and snow do not accumulate inside, which can add tens of kilograms of excess weight to the season.
Check the riveted joints regularly, and although the alloy itself does not rust, the joints can oxidize, especially if the boat was in salt water, and timely treatment with sealant will prolong the life of the structure.
⚠️ Warning: Never drag a loaded Oka-4 boat along the shore, which will cause rapid abrasion of the bottom and scratches that will become hotbeds of corrosion. Use a wheeled transom trailer or a piece of red tape.
☑️ Preparation for the season
Modernization and tuning for weight loss
Many owners are looking to lighten the design to improve driving performance, and the easiest way is to replace regular wooden cans with lightweight aluminum or plastic counterparts, which can save up to 5-7 kg, which is palpable for a small boat.
Heavy stationary hazelnuts can also be abandoned in favor of soft hermoshki, and removing excess equipment, such as heavy anchor boxes from steel, in favor of light cat anchors will also contribute to the development of a new model. weight-optimizationBut don't get carried away and sacrifice safety for the sake of saving kilograms.
Some craftsmen replace regular steel fasteners with titanium or dural, but this is an expensive process that pays off only when used in sports. For ordinary fishing, it is enough just not to carry excess equipment.
The optimal strategy for the owner of the Oka-4 is not a fight for every gram of body weight, but a competent distribution of payload and refusal to carry excess luggage on board.
In conclusion, the Oka-4 remains one of the best offerings in its class, thanks to its balance of strength and weight, and understanding the real-world specifications will allow you to operate the boat safely and with pleasure for many years to come.
What is the real weight of the Oka-4 boat with attachments?
The body itself weighs about 115 kg. With the installed engine (30 kg), a full tank (10 kg), an anchor and a minimum set of equipment, the total weight on the trailer will be approximately 160-170 kg.
Can the Oki-4 be increased?
The 400kg factory payload is the limit for stability and buoyancy, and artificially augmented only by adding extra floats, but it will change the performance and may not be safe without engineering.
Do I need to register Oka-4 in GIMS?
Yes, the boat is subject to registration if its mass in running order exceeds 200 kg or if the power of the installed engine is more than 8 kW (about 10.8 hp).